package com.example.lettcode._202412._20241211;

import java.util.Arrays;

/*
344. 反转字符串
编写一个函数，其作用是将输入的字符串反转过来。输入字符串以字符数组 s 的形式给出。
不要给另外的数组分配额外的空间，你必须原地修改输入数组、使用 O(1) 的额外空间解决这一问题。

示例 1：
输入：s = ["h","e","l","l","o"]
输出：["o","l","l","e","h"]

示例 2：
输入：s = ["H","a","n","n","a","h"]
输出：["h","a","n","n","a","H"]

提示：
1 <= s.length <= 105
s[i] 都是 ASCII 码表中的可打印字符
 */
public class _344_fan_zhuan_zi_fu_chuan {
    public static void main(String[] args) {
        char[] s = {'H','a','n','n','a','h'};
        reverseString(s);
        for (char c : s) {
            System.out.println(c);
        }
    }

    public static void reverseString(char[] s) {
        int l = 0;
        int r = s.length-1;
        while(l<r) {
            char temp = s[l];
            s[l] = s[r];
            s[r] = temp;
            l++;
            r--;
        }
    }

}
